422results about How to "Guaranteed thermal conductivity" patented technology

The invention discloses a bunker coal environment-friendly synergist, which comprises the following components by weight percent: 1 to 10 percent of ammonium bicarbonate, 1 to 8 percent of sodium bicarbonate, 1 to 10 percent of sodium carbonate, 1 to 5 percent of sodium nitrate, 1 to 10 percent of potassium nitrate, 1 to 15 percent of calcium carbonate, 1 to 10 percent of sodium hydroxide, 2 to 10 percent of calcium hydroxide, 1 to 10 percent of potassium permanganate, 3 to 15 percent of potassium chloride, 10 to 35 percent of sodium chloride, 1 to 10 percent of ammonium chloride, 1 to 15 percent of calcium chloride, 1 to 10 percent of borax, 1 to 10 percent of macaroni, 1 to 5 percent of potassium carbonate, 1 to 5 percent of calcium nitrate, 1 to 5 percent of iron oxide, and the balance being micro turpentine, sulfur and paraffin wax. The bunker coal environment-friendly synergist makes flame of combustion be more rampant and denser, the furnace temperature rise to a higher level, the hearth be brighter and cleaner and tail gas be cleaner.

The invention discloses an electronic cigarette. The electronic cigarette comprises a cartridge and a battery device which are detachably connected, the battery device comprises a battery, a heating piece, a detection assembly, a sensor and a first control panel, and the detection assembly is used for generating a connecting signal when the cartridge is connected with the battery device; the sensor is used for generating a smoking signal under the smoking effect, and if and only if the detection assembly generates the connecting signal, and the sensor generates the smoking signal, the first control panel controls the battery to supply power to the heating piece, so that the heating piece conducts atomizing operation. According to the electronic cigarette, if and only if the detection assembly generates the connecting signal, and the sensor generates the smoking signal, the first control panel can control the battery to supply power to the heating piece, and the function of protecting safety of children is achieved.

The invention discloses a preparation method of a Cu-Nb multi-core composite wire with the rectangular cross-section, which comprises the following steps: firstly, carrying out first extrusion assembly and drawing for a single pure Nb rod and a first outer oxygen-free copper sheathing; secondly, carrying out second extrusion assembly and obtaining a first Cu-Nb multi-core composite filament; secondly, according to the extrusion assembly method and related process parameters in the step 2, repeatedly carrying out third extrusion assembly; thirdly, according to the extrusion assembly method and related process parameters in the step 2, repeatedly carrying out fourth extrusion assembly; and finally, setting and drawing by a rectangular mold. The invention has simple process step, short process, high production efficiency, low preparation cost and good use effect, and the produced Cu-Nb multi-core composite wire has superior performance; and the invention is suitable for mass production, can better control the dimensional accuracy of the rectangular cross-section, and can machine any size and length of hundred-million-magnitude-order Cu-Nb multi-core composite wires with the rectangular cross-section.

The invention belongs to the technical field of organic silicon pouring sealants, and particularly relates to a low release quantity additive halogen-free flame-retardant heat-conduction organic silicon pouring sealant and a preparation method thereof. The pouring sealant comprises an A component and a B component, wherein the A component and the B components are mixed in weight ratio of 1:1; the A component comprises basic rubber materials, polymethyl hydrogen siloxane and crosslink breaker; the weight ratio of the basic rubber materials, the polymethyl hydrogen siloxane and the crosslink breaker is 100:2.5-4:0.01-0.5; the B component comprises basic rubber materials and catalyzer; the weight ratio of the rubber materials and the catalyzer is 100:0.15-0.2; the A component and the B component are uniformly mixed according to the equal weight ratio and are defoaming to obtain the pouring sealant. The pouring sealant is good in flowability, can be heat and cured at room temperature, has favorable heat conductivity and flame retardancy, has the release quantity being lower than 0.5 percent under the condition of 120 DEG C*24h, and is particularly applicable to pouring with the heat-conduction and flame-retardant requirements under a seal system in the LED (Light-emitting Diode) industry.

The invention discloses an integration method of a high-reliability power hybrid integrated circuit. The method comprises the following steps of: (1) firstly, washing an original thick film substrate with ultra sound and drying; (2) forming a multilayer Cu-Ni-Cr-Au composite film at the back of a ceramic substrate in a high-vacuum magnetically-controlled sputtering platform in one step by using a high-vacuum sputtering method; (3) selectively sputtering another Cu-Ni-Cr-Au composite film again on the basis so that a multilayer metal film grooved mesh is formed in a selected region; (4) then, annealing at a high temperature to obtain a thick film substrate; and (5) assembling the thick film substrate on a shell base, assembling a semiconductor chip and other separate devices, bonding with silicon-aluminum wires to connect the circuit and seal a lid to obtain a made high-reliability power hybrid integrated circuit. The integrated circuit made by the method has favorable welding system compactness, adhesion, heat conductivity, rapid radiation and circuit reliability and is widely applied to the fields of aerospace, aviation, ships, precise instruments, geological exploration, oil exploration, communication, and the like.

The invention relates to a thin continuous uniform air flowing characteristic numerical simulation method. The method comprises the following steps: introducing a spatial derivative directly associated with a conservation variable when solving a conservation equation of a nonlinear coupled constitutive model, and secondly expressing the conservation variable U and an additional variable S into linear expression of one set of primary functions so as to discretize the conservation variable U and the additional variable S; converting conservation quantity under an original unstructured grid to astandard grid, integrating on a control volume, carrying out each step of iteration to obtain initial values of viscous stress and heat conduction items of a constitutive relation equation, introducing the initial values of viscous stress and heat conduction items of the constitutive relation equation into a nonlinear algebraic constitutive equation set converted to a differential equation initialvalue problem, then carrying out iteration to obtain the viscous stress and the heat conduction items, then returning back and substituting into the conservation equation, determining that the calculation is ended after the specific problems meet the error conditions, and outputting the flowing characteristic of the flow field.

The invention relates to a powder metallurgy friction pair for braking of a heavy-load vehicle and a preparation technology thereof. A static friction piece comprises, by weight, 60-70 parts of reduced iron powder, 12-18 parts of electrolytic copper powder, 2-4 parts of molybdenum disulfide powder, 1-3 parts of ferro-manganese alloy powder, 1-3 parts of electrolytic nickel powder, 3-5 parts of silicon dioxide powder and 6-10 parts of crystalline flake graphite powder. A kinetic friction piece comprises, by weight, 14-18 parts of the reduced iron powder, 40-60 parts of the electrolytic copper powder, 2-4 parts of the molybdenum disulfide powder, 4-6 parts of tin powder, 1-3 parts of ferro-chrome alloy powder, 2-4 parts of the ferro-manganese alloy powder, 1-3 parts of the electrolytic nickel powder, 1-3 parts of chromium powder, 1-3 parts of aluminum oxide powder, 4-7 parts of the silicon dioxide powder and 10-14 parts of the crystalline flake graphite powder. The preparation technology of the powder metallurgy friction pair for braking of the heavy-load vehicle includes the steps of production, sand blasting, reshaping and electroplating of a steel backing and the steps of compounding, mixing, chemical analysis on ingredient uniformity, prepressing shaping, pressure sintering, mechanical processing, product finishing and checking of the power materials. Known from an MM1000 test that the prepared powder metallurgy friction pair for the heavy-load vehicle has the advantages of excellent frictional wear resistance, stable braking performance, low energy consumption and wear rate, good material uniformity and heat-conducting performance and long service life, and the problems of a large breaking wear rate, short service life and the like resulted from severe decline of a high-temperature friction coefficient of an existing friction pair for the heavy-load vehicle are solved.

The invention discloses an LED (Light Emitting Diode) lamp, which comprises a lamp holder, an LED substrate and a plurality of LED light sources, wherein the LED substrate is fixedly arranged on the lamp holder; the LED light sources are fixedly arranged on the LED substrate; the lamp holder comprises an outer shell, an inner shell in the outer shell and a frustum-shaped light source mounting table of a hollow structure; the light source mounting table is provided with a large end and a small end opposite to the large end; the large end is fixedly arranged in the inner shell; the small end protrudes out of the inner shell; the outer surface of the light source mounting table is provided with a plurality of radiating columns; the LED substrate is fixedly arranged on the radiating columns; the light source mounting table of the LED lamp has the hollow structure; and the LED substrate is fixedly arranged on the radiating columns on the outer surface of the light source mounting table to increase the radiating efficiency of the LED light source.

The invention belongs to the technical field of thermally conductive and insulating materials, and particularly relates to an epoxy resin thermally conductive insulating material and a preparation method thereof. The material includes an epoxy resin basic material, inorganic filler and a curing agent, wherein the inorganic filler is composed of fillers of three different particle sizes. The epoxyresin thermally conductive insulating material has excellent thermal conductivity and insulation performance only through selection of the ratio of three different particle size grading of the inorganic filler, the ratio of the use amount of the filler of different particle sizes and the particle sizes, and no surface-modified inorganic filler is needed, so that the material cost is reduced, and the preparation method of the material is simpler. The thermal conductivity of the material can reach 1.25 W.m<-1>.K<-1> at 30 DEG C, the highest thermal conductivity can reach 1.62 W.m<-1>.K<-1>, theresistivity of the material is 2.9x10<16> omega.cm or above below 30 DEG C, and application requirements of power electronic transformers, saturation resistors and other high insulation scenes can bemet fully.

The invention discloses a method for preparing a polymer-based composite material with a high dielectric constant. The method comprises the following steps: A, co-blending solutions to prepare master batch: dissolving 100 parts by weight of polyvinylidene fluoride into N,N-dimethyl formamide to obtain a solution I; ultrasonically dispersing 10 parts by weight of boron nitride into the N,N-dimethyl formamide to obtain a solution II; dispersing 1.6-2 parts by weight of carbon nanotube into the N,N-dimethyl formamide to obtain a solution III; mixing the solution I, the solution II and the solution III, and performing ultrasonic treatment to obtain a mixed solution; heating the mixed solution to 70-100 DEG C, preserving heat for 2-4 hours, and putting the mixed solution into a vacuum oven for drying to obtain the master batch; B, melt blending: extruding and granulating the master batch in a micro-extruder at the temperature of 190 DEG C for 6-10 minutes to obtain the polymer-based composite material. The composite material prepared with the method has the advantages of extremely high dielectric constant, low dielectric loss, high heat conductivity, simple process and contribution to large-scale production.

The invention discloses a preparation method of a diamond/copper composite high in heat conduction performance. The preparation method comprises the following steps of 1, uniformly mixing diamond obtained after surface of the diamond is subjected to degreasing and roughening treatment with tungsten powder according to the mass ratio of 1: 4.5, heating a powder mixture under the vacuum condition, conducting heat preservation for 2-8 hours at the temperature of 1030 DEG C, and finally, separating out modified tungsten-plated diamond, wherein the vacuum degree is 10<-2>-10<-4> Pa, and the temperature rising rate is 5 DEG C/min; and 2, uniformly mixing the tungsten-plated diamond, with the mean particle size being 125 microns, obtained after surface modification with copper powder with the mean particle size being 45 microns with the total volume content of the tungsten-plated diamond accounting for 55%, sintering an obtained powder mixture, and then cooling the obtained power mixture to the room temperature, so that the diamond/copper composite is obtained, wherein the sintering parameters are that the pressing pressure is 40 MPa, the temperature is 1000 DEG C, the temperature risingrate is 100 DEG C/min, the sintering time is 10 minutes, and the atmosphere is vacuum.

The invention discloses a ceramic alloy coating and a coating layer, wherein the coating includes a ceramic solid phase component, a metal solid phase component and a liquid phase component; the ceramic alloy coating is characterized in that the ceramic solid phase component includes high-hardness oxide ceramic powder, high-emissivity non-metallic oxide ceramic powder and lamellar structural silicate powder; the metal solid phase component includes high-toughness metal fibers and high-thermal-conductivity metal powder; the liquid phase component is one of a liquid silicate inorganic binder, aliquid phosphate inorganic binder and a liquid sol inorganic binder, the strength and toughness of the ceramic coating layer can be effectively improved. Moreover, the preparation method is simple andis prone to promotion and application.

An electrical heating apparatus has: a fin brazed on at least one of a main body upper wall and a main body lower wall of a tube; an insertion unit having an electro-heat-generating element pressure-welded to a wall of one of the main body upper wall and the main body lower wall; and an edge part projected in the width direction from each of main body vertical walls to form an edge space. The edge space is formed so as to be continuous with the insertion space and is smaller in thickness dimension than the thickness dimension of the insertion unit.

The invention relates to a copper-based bonding lead and a production process thereof. In the copper-based bonding lead, high-purity copper-based alloy is used as a substrate, a surface of the substrate is plated with a high-purity palladium protection layer, and the substrate material comprises microelements such as silver, indium, phosphorus and yttrium. The preparation comprises the following steps of high-purity copper smelting, single-crystal copper-based alloy casting, rough pulling, medium pulling, palladium plating, fine pulling, slight pulling, cleaning and passivation, compound winding and packaging. The prepared copper-based bonding lead has excellent performance such as mechanical property, welding performance, electrical conductivity, heat conductivity and oxidation resistance, and meanwhile, the copper-based bonding lead is small in wire diameter and is suitably used for package of a high-density and multi-pin integrated circuit.

The invention discloses a mortar-coated heat-preserving plate which comprises a base plate. Glass fiber cloth layers are attached to the upper end face and/or the lower end face of the base plate. Mortar layers are arranged on the glass fiber layers on the upper end face and/or the lower end face in a coated mode, mortar comprises 33-37 parts of silicate cement, 6-7 parts of brucite fibers, 23-27 parts of expanded perlite, 0.3 part of hydroxypropyl methylcellulose, 0.1 part of polypropylene fibers, 0.5 part of calcium stearate, 17-26 parts of modified aerogel particles and 0.3-0.6 part of a promoter. The modified aerogel particles are prepared due to the fact that a surface modifier is sprayed on the surfaces of aerogel particles for surface modification. The heat-preserving mortar is made of inorganic materials, is resistant to acid, alkali and corrosion, does not crack or disengage, is high in stability, is identical to a building wall in service life, and has excellent temperature stability and chemical stability. Surface modification is carried out on the aerogel particles, so that the physical property that the aerogel particles are easy to break and can be easily combined with water is overcome, the heat conductivity of the surface-modified aerogel heat-preserving mortar reaches below 0.04W/m.K, and the heat-preserving effect of the heat-preserving mortar is improved.

The invention relates to a solar heat collecting and storing aluminum foil and a manufacturing method thereof. The solar heat collecting and storing aluminum foil comprises the following chemical components in percentage by mass: 0.01-0.07% of Si, 0.01-0.12% of Fe, 0.08-0.12% of Cu, smaller than or equal to 0.005% of Mn, smaller than or equal to 0.005% of Zn, smaller than or equal to 0.005% of Mg, 0.01-0.03% of Ti and the balance of Al and inevitable impurities. The aluminum foil has a thickness ranging from 0.043 to 0.045mm, the tensile strength of 250-280MPa, the yield strength of 235-265MPa, the elongation greater than or equal to 1%, and the thermal conductivity greater than or equal to 225W / (m.K) at 25 DEG C. Through reasonable setting of contents of copper and other alloy elements in the aluminum foil, a black copper oxide film layer with a strong surface colorizing capability is formed during surface chemical etching of the aluminum foil, so that the aluminum foil increases the solar energy absorbing rate and decreases the reflection coefficient.

The invention provides a battery module with water-cooling heat dissipation for tabs. The battery module comprises a plurality of battery module units, wherein each battery module unit comprises a battery core group consisting of a plurality of battery cores, a front end plate arranged at the front side of the battery core group, a left side plate and a right side plate respectively arranged at the left side and right side of the battery core group, a rear end plate arranged at the rear side of the battery core group, a bracket arranged above the battery core group, and heat-dissipating fins and a water-cooling plate close to the bracket, wherein the bracket is provided with tabs which are arranged at the left side and right side of the bracket; the water-cooling plate is provided with a water feeding pipe, a water discharging pipe and a water-cooling pipeline, and the water-cooling pipeline is wholly U-shaped; the front end plate is provided with a water feeding pipeline, a water discharging pipeline, a positioning pin and a positioning groove, and a vertical water inlet connected with the water feeding pipe is formed in the water feeding pipe and above the front end plate; and a vertical water outlet connected with the water discharging pipe is formed in the water discharging pipe and above the front end plate. Different battery module units are connected and fixed by the positioning pin and the positioning groove. The battery module provided by the invention has the advantages that the heat-dissipating fins and the water-cooling plate are arranged above the tabs generating maximum heat, and the front end plate is provided with the water feeding pipeline and the water discharging pipeline communicated with the water-cooling plate, so that the heat-dissipation efficiency is high, the assembly is simple and the appearance is clean and tidy.

The invention relates to an aluminum base composite material, in particular to an aluminum base carbon fiber graphite composite material and a preparation method. The method comprises the following steps of: firstly, adopting finely sorted, processed and checked graphite fluoride powder as raw materials for preparing spherical graphite particles through granulation and spheroidization; then, using a stainless steel plate as a cathode and pure aluminum as an anode, filling insert gas between the two electrodes, exerting voltage, soaking the spherical graphite particles by glucose amide containing 0.23 to 0.6 percent of boron, cleaning and baking the spherical graphite particles, placing the spherical graphite particles on a disc between the cathode and the anode, shaking the disc while exerting the voltage, and arranging latticed high-performance carbon fiber in a casting mold at the arrangement density determined according to the intensity requirement of the materials; filling the spherical graphite particles with the diameter between 1 and 5mm in the casting mold, finally, injecting aluminum liquid, applying pressure at the upper part of the mold so that the aluminum liquid can be filled between the spherical graphite particles, and obtaining products after cooling. The composite material is simple to prepare, and has the advantages of high product intensity, light weight, wear resistance, low raw material consumption and high production efficiency.

The invention discloses aluminium foil produced by utilization of cast-rolled slabs and used for dynamic functional materials. The aluminium foil comprises following chemical components: more than 99.30% of Al, 0.30-0.5% of Fe, 0.05-0.2% of Si, 0.045-0.1% of Cu, 0.015-0.025% of Ti and 0.006-0.015% of Sr, with the balance being impurities, and the sum of mass percentages of the Al, the Fe, the Si, the Cu, the Ti, the Sr and the impurities being 100%. A preparing method of the aluminium foil is also disclosed. The aluminium foil prepared by the method has advantages of strength, high elongation percentages, good compactness, uniform surface roughness and high surface cleanliness.

The process of producing continuous casting crystallization roller includes the following steps: cutting axial water inlet hole and water outlet hole on roller core, and forming water guide hole on the core wall to communicate the water inlet hole and the water outlet hole with outside surface of the core; installing metal pipe outside the core to form crystallization roller cooling system with several cooling loops; and cold pneumatic spraying through driving metal grains with pressure over 1.0 MPa to bump the outer surface of the core at high speed so as to make metal grains deform sufficiently for adhering onto the surface of the core and the outer surface of the cooling loops, filling the gaps, forming coating in enough thickness to cover the cooling loops and forming roller sleeve in enough thickness.

The invention provides an environment-friendly type carbonaceous press material for a maintaining blast furnace hearth. The environment-friendly type carbonaceous press material comprises the following components by weight: 15-35% of electrode graphite, 20-32% of crystalline flake graphite, 4-11% of silicon carbide, 5-15% of quartz sand, 1.0-3.0% of boron carbide, and 24-35% of environmental protection modified tar, wherein the sum of the components is 100%. The various said dry raw materials, in the proportions, can be used in a production field after weighted, burdened, uniformly mixed, uniformly stirred with a liquid binder and sealedly packaged. The carbonaceous press material of the invention has advantages of good fluidity and fallibility, high density and intensity, high thermal conductivity, good anti-aggressivity to melt molten iron and slag, high temperature air-flow flushing resistance, and good anti oxidizability, and is especially in favor of raising a blast furnace life and in favor of safety production. The carbonaceous press material contains less poisonous and harmful substances like benzopyrene, and is in favor of environmental protection.

The invention discloses an air-cooling and water-cooling hybrid radiating module for a large-power series connected IGBT (Insulated Gate Bipolar Translator). The radiating module comprises a radiator body, a heat-conducting material, and a fan, wherein the radiator body comprises an air-cooling channel and a water-cooling channel; an IGBT module is installed on the frontage of a radiator through the heat-conducting material; a sealed water-cooling water inlet and a sealed water-cooling water outlet are formed in a side face the radiator; and the fan is installed on the side face vertical to the water inlet-outlet; the side face of the radiator is matched with an air outlet side of the fan in size, the seal connection is formed between the air outlet of the fan and a heat sink, thereby forming the forced air-cooling heat exchange. The air-cooling and water-cooling hybrid radiating module disclosed by the invention can select the radiating way and flexibly control the heat release, and the volume of the radiating equipment is reduced to a large extent. The radiating demand in the large-power IGBT parallel application occasion can be satisfied.